Means for feeding fluid by intermittent changes of fluid pressure



Oct. 30, 1928.

c. H. NORDELL MEANS FOR FEEDING FLUID BY INTERMITTENT CHANGES OF FLUID PRESSURE Filed Sept. 12, 1922 I NV EN TOR.

w a A TTORNEY.

Patented Oct. 30, 1928.

- UNITED STATES PATENT OFFICE.

CARL H. NORDELL, OF FORT WAYNE, INDIANA, ASSIGNOR TO THE PERMUTIT COM- PANY, A CORPORATION OF DELAWARE.

MEANS FOR FEEDING Efiun BY INTERMITTENT CHANGES or morn rEEssUEE.

Application filed September 12, 1922. Serial No. 587,837.

My invention relates to devices for feeding fluids by intermittent change of fluid pressure.

Such devices may be adapted to a wide range of uses without departing from the spirit of my invention.

Heretofore great difliculty has been experienced in feeding fluids continuously in very small quantities because such feeding must be through minute apertures which readily become clogged, destroyin the accuracy or even the continuity 0 feeding and requiring continuous supervision to maintain operation. Obviously, such feeding means would be totally inadequate for use in connection with automatically oper ated apparatus.

Most requirements are fully met by inter- -mittent feeding of small. charges of fluid to be fed, providing the intervals between charges are short and the charges are relatively uniform in amount. My invention consists in such amethod of intermittent feeding and apparatus for carrying this method into effect.

The particular embodiment of my invention selected for illustration is a brine feeding device, adapted for use on automatic water softening apparatus such as that ,il lustrated and described in my co-pending applications Serial No. 487,465 filed July 25th, 1921, Patent 1,608,661, Nov. 30, 1926, Serial No. 561,095 filed May 15th, 1922 and Serial No. 585,045 filed August 29th, 1922.

Figure 1 shows the salt tank and feeding device in vertical axial section, the piston and valve being at rest, with suitable pipe connections therefor, and

Fig. 2, a detail, is an enlarged view in vertical axial section of the lower portion ofthe .feeder, with the piston and checkvalve in partly raised position.

Referring now to the drawings, 1 is a salt tank, with a salt charging opening, 2, and

a leak tight cover, 3, therefor. A pipe, 4:, preferably with a valve, 4, feeds water from a source of supply (not shown) to the salt tank, 1. A screen, 5, at the bottom of the salt tank, 1, insures clear brine reaching the outlet 6, by keeping out salt and dirt. A pipe, ,conveys brine from the outlet, 6, to the brine feeder.

The brine feeder consists of an upper casing, 8, cap, 9, lower casing, 10, stufiing box, 11, and t e parts enclosed in and connected therewith. The pipe, 7 conveys brine into the chamber, 19, of the casing, 10, under the loose fitting free floating cylindrical slug piston, 12.

A rod, 13, adjustable as to height, and secured in the desired position by set screw, 14, determines the stroke of the piston, 12. An axially bored valve seat, 15, is secured in the casing and a ball, 17, or other check valve, rests upon 15 and closes the opening, 16, therethru.

provides an outlet for brine from the feeder.

It will be understood that both salt tank there. is a change of pressure as hereinafter described; such change being caused by a means not a part of this invention and not shown herein.

The operation of the device is as follows beginning with the elements in the position shown in Fig. 1

Either by a temporary decrease of pressure in the pipe, 18, or temporary increase of pressure in the pipe, 4, a charge of brine is forwarded thru the pipe, 7, from the tank, 1, into the chamber, 19, below-the iston, 12, causing the piston to rise and disc arge the brine already in the chamber, 20, through the opening, 16, unseating the valve, 17, dis- A pipe, 18, preferably having a valve, 18,

charging said brine into the chamber, 21,

and forcing a part of the brine already in t e casing, 10, into the chamber, 20; when allparts are again in the position shown in Fig. 1.

I claim as my invention and desire to se-.

cure by Letters Patent of the United.

States V Liquid feeding means comprising a vertically disposed cylinder, a loosely fitting piston slug disposed therein, means formed .in the cylinder for admitting fluid to the un- Wardly,--and being positioned to close said escape means when the slug moves downwardly. 10

In testimony whereof I have hereunto set my hand.

CARL H. NORDELL 

